Controlling the nucleation of multiple precipitates in precipitation-strengthened steel through Mo partitioning. Issue 12 (13th August 2022)

• Record Type: Journal Article
• Authors: Qiu, Nianshuang; Shen, Zhuang; Zuo, Xiaowei; Zhou, Gang
• Is Part Of: Materials science and technology. Volume 38:Issue 12(2022)
• Page Start: 876
• Page End: 881
• Publication Date: 2022-08-13
• Subjects: Nanoparticles -- Mo addition -- Precipitation-strengthened steel -- Atom probe tomography -- First-principles calculation; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2022.2067613
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : In this study, atom probe tomography and first-principles calculations were used to investigate the influence of Mo addition on multiple precipitates, including isolated NiAl-based precipitates as well as NiAl-based and Cu-rich co-precipitates, in high-strength ferritic steel. The co-NiAl-based precipitates were experimentally confirmed to be nucleated from the abundance of Cu atoms. The addition of Mo accelerated the nucleation process of Cu-rich precipitates and structural transformation of co-precipitates, led to a considerable increase in the nucleation rate of NiAl-based precipitates, and slightly promoted isolated NiAl-based precipitates. The results were discussed from the perspective of lattice misfits and mixing enthalpy.